SecGate3600, a network firewall product developed by NSFOCUS, contains a sensitive information disclosure vulnerability in the /cgi-bin/authUser/authManageSet.cgi endpoint. The affected component fails to enforce authentication checks on POST requests to retrieve user data. An unauthenticated remote attacker can exploit this flaw to obtain sensitive information, including user identifiers and configuration details, by sending crafted requests to the vulnerable endpoint. An affected version range is undefined. Exploitation evidence was first observed by the Shadowserver Foundation on 2024-06-18 UTC.